Patterns and Fills of Permian Sequence Stratigraphy in South China

LI Xiang hui; WANG Cheng shan; CHEN Hong de; TIAN Jing chun

The patterns of thime evolution and space distribtion of the Permian sequence stratigraphy in South China,which are recognized as in the paper by Wang et al.in this period of the journal,are well confined by the research on sequence fills of the eleven depositional sequences. It is proposed that two stages of depositional sequence fills can be classified,i.e.,(1)Fills by carbonate ramp and platform depositional sequences could have been undertaken during early Permian,into which sub fills could have been done by carbonate ramp and platform depositional sequences respectively.(2)Fills could have been completed by depositional sequences in dominant terrigenous clastics environments mixed by volcanic clastics during late Permian.It can be subclassified into two subdivisions as sediments with coal in wet climate in the Wujiaping Stage and as coarse clastics in extensional pull aparting faults during the Changxing Stage. It is supposed that the four type I sequence boundary surfaces in Permian could be directly relevant to the tectonic upwarding events.The basal boundary surface of the S 1 might have been controlled by the Yunnan Movement (or named of Guizhou Guangxi Movement) that had taken roles in the middle Yangtze Craton and on the western margin of the Cathayan Craton.The boundary surface of the S 6 might have been in fluenced by the first episode of the Dongwu Movement (also called Dachang Movement) which had acted similar areas as the S 1 The S 7 boundary surface had ever widespread related to the Dongwu Movement all over the South China during the gap between the Early and Upper Permian.And the boundary surface on the S 1 base might have been under impacts by the Guiyang Movement almost the yangtze Craton. One of the most characteristically depositional sequence fills is volcanic clastics in some horizons in the TST of late Permian,during which a few horizons of the transgressive systems tracts (TST) had ever been filled by volcanic clastics.There is a typical sequence pattern of sedimentary facies in the TST with volcanic clastics.It is common that the sequence from calsiclastic turbidite facies to volcanic turbidite facies,to marlstone facies in the TST.The other is the delta system along the margins of paleolands.Most of the delta systems constitute the high systems tracts (HST),and/or few shelf marginal systems tracts (SMT) or lowest systems tracts (LST). Reefal fills can be found in the upper and middle Yangtze Cratons and Youjiang Basin,and four types of reefal fills can be differentiated in the depositional sequence fills.They are TST type,HST type,LST type,and SMT type,in which TST type and HST type are predominant along the synsedimentologicall strike slip faults.Reefs in high abundance and diversity filled in the TSTs had been lived in deep water,mostly in slope,deep ramp,and/or inter platform.Reefs in the HSTs are of low abundance and diversity of species and community,and they had been lived in shallow sea such as carbonate platform,shore,shelf and isolated platform

Sedimentary Geology Institute,Chengdu University of Technology,Chengdu 610059

Received Date: 1998-11-26

Rev Recd Date: 1999-01-02

Publish Date: 1999-12-10

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Abstract: The patterns of thime evolution and space distribtion of the Permian sequence stratigraphy in South China,which are recognized as in the paper by Wang et al.in this period of the journal,are well confined by the research on sequence fills of the eleven depositional sequences. It is proposed that two stages of depositional sequence fills can be classified,i.e.,(1)Fills by carbonate ramp and platform depositional sequences could have been undertaken during early Permian,into which sub fills could have been done by carbonate ramp and platform depositional sequences respectively.(2)Fills could have been completed by depositional sequences in dominant terrigenous clastics environments mixed by volcanic clastics during late Permian.It can be subclassified into two subdivisions as sediments with coal in wet climate in the Wujiaping Stage and as coarse clastics in extensional pull aparting faults during the Changxing Stage. It is supposed that the four type I sequence boundary surfaces in Permian could be directly relevant to the tectonic upwarding events.The basal boundary surface of the S 1 might have been controlled by the Yunnan Movement (or named of Guizhou Guangxi Movement) that had taken roles in the middle Yangtze Craton and on the western margin of the Cathayan Craton.The boundary surface of the S 6 might have been in fluenced by the first episode of the Dongwu Movement (also called Dachang Movement) which had acted similar areas as the S 1 The S 7 boundary surface had ever widespread related to the Dongwu Movement all over the South China during the gap between the Early and Upper Permian.And the boundary surface on the S 1 base might have been under impacts by the Guiyang Movement almost the yangtze Craton. One of the most characteristically depositional sequence fills is volcanic clastics in some horizons in the TST of late Permian,during which a few horizons of the transgressive systems tracts (TST) had ever been filled by volcanic clastics.There is a typical sequence pattern of sedimentary facies in the TST with volcanic clastics.It is common that the sequence from calsiclastic turbidite facies to volcanic turbidite facies,to marlstone facies in the TST.The other is the delta system along the margins of paleolands.Most of the delta systems constitute the high systems tracts (HST),and/or few shelf marginal systems tracts (SMT) or lowest systems tracts (LST). Reefal fills can be found in the upper and middle Yangtze Cratons and Youjiang Basin,and four types of reefal fills can be differentiated in the depositional sequence fills.They are TST type,HST type,LST type,and SMT type,in which TST type and HST type are predominant along the synsedimentologicall strike slip faults.Reefs in high abundance and diversity filled in the TSTs had been lived in deep water,mostly in slope,deep ramp,and/or inter platform.Reefs in the HSTs are of low abundance and diversity of species and community,and they had been lived in shallow sea such as carbonate platform,shore,shelf and isolated platform

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[1]

1 陈显群, 刘应楷, 童鹏. 东吴运动持川黔运动之新见 [J]. 石油与天然气地质, 1 987, 8(4):421～423

2 范嘉松. 中国西南地区二叠系生物礁的类型、基本特征和生物群落 [J]. 天然气勘探和开发, 1 987, 2:1 0～1 9

3 范嘉公, 张维. 鄂西利种晚二叠世生物礁的纤维海绵和Tabulo-zoan [J]. 地质科学, 1 987, 4:326～333

4 范嘉松, 张维, 齐敬文, 王炯章. 云南广南早二叠世生物礁的基本特征及其造礁生物 —串管海绵化石 [J]. 地质科学, 1 987, 1:50～60

5 范嘉松, 张维, 马行等. 鄂西二叠纪生物礁的基本特征及其发育规律 [J]. 地质科学, 1 982, 3:274～282

6 范嘉松. 广西隆林二叠纪生物礁 [J]. 北京:地质出版社, 1 990. 34～35

7 侯方浩, 黄继祥. 南盘江断陷区二、三叠系的火山碎屑浊积岩 ———一种独特的无海底扇浊流沉积模式 [J]. 沉积学报, 1 984, 2(4) :20～23

8 李四光. 中国东南部古生代后期之造山运动 [A]. 见:地质力学方法, 北京:科学出版社, 1 931～1 976

9 李学述, 罗新民. 湖南上二叠统长兴期生物礁的研究(摘要) [J].地球科学, 1 988, 1 3(5):472

10 牟传龙, 丘东洲, 王立全, 万方. 湘鄂赣二叠纪沉积盆地与层序地层 [J]. 岩相古地理, 1 997, 5(1 7):1～26

11 王文耀. 浙西冷坞二叠纪生物礁的基本特征[J]:石油实验地质,1 987, 9(4):229～304

12 夏文臣, 周杰, 葛立刚等. 华南二叠 —三叠系成因地层序列及古特提斯海重建 [J]. 地球科学, 1 994, 1 9(5):663～674

13 许效松, 刘宝王君, 赵玉光. 上扬子地台西缘二叠系 —三叠系层序界面成因分析与盆山转换 [J]. 特提斯地质, 1 996, (20):1～30

14 张帆, 方少仙. 黔南桂北晚二叠世火山碎屑来源、沉积水深及土地构造环境 [J]. 沉积学报, 1 990, 8(4):22～30

15 张继庆, 李汝宁, 官举铭等. 四川盆地及邻区晚二叠世生物礁[M]. 成都:四川科学技术出版社, 1 990

16 周义平, 任友谅. 滇东黔西晚二叠世煤系中火山灰是变粘土岩的元素地球化学特征 [J]. 沉积学报, 1 994, 1 2(2):1 23～1 31

17 王立亭, 陆彦邦, 赵时久等. 中国南方二叠纪岩相古地理与成矿作用 [M]. 北京:地质出版社, 1 994. 59～61

Patterns and Fills of Permian Sequence Stratigraphy in South China

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